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发明名称
Filter for filter type respirators
摘要
申请公布号
US2106257(A)
申请公布日期
1938.01.25
申请号
US19360103905
申请日期
1936.10.03
申请人
NATHAN SCHWARTZ
发明人
SCHWARTZ NATHAN
分类号
A62B23/02
主分类号
A62B23/02
代理机构
代理人
主权项
地址
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